Ventilator.



A..L-AAKSO.

VENTILATOR,

APPLICATION minimum. 1911.

2 SHEETS-SHEET l.

L INVENTOR wzmzssss h 5. 6 flcO L 0671190. fig BY fi ATTORN EY 1a: Non-u nun co. mmuma, wunmcmu n r A. LAAKSO.

VENTILATOR.

. APPLICATION FILED AUG. 3I. 1911.

1,289,821 Patented Dec. 31, 1918.

2 SHEETS-SHEET 2- 5? i:| 5 INVENTOR Wmwssses ATTORNEY m: mums PErEns m. rmuo-Llrmz. vlAsnlmzm'L p. c.

- LFRED LA'Ak'so, "orWAK'EFIELD, iiiiei fiiii;

"To; allwhom it may concern: 61138-113 known; that I, ALFRED LAAK'so, a

RYa-kefield; in -the countyof' Gogebic and State-of Michigan,*havein-ventednew and useful fimn'rov'ements f Ventilators,- of

iv-hic-li"theitollow-inuis a specification 1155 inventionrelates to improvements in Ventilators-for buildings, 1 (,H'III carryingout my invent-ion, it is my ipurpose 'to'constructa ventilator having: its

gartsso arranged; that currentsof air will directedthrough; suitable openings i'n ie cow-l or toot thereof through certain flues in the body forsta'clrof the device,

;whichcurrents not only supply fresh air to the interior of the buildings, but tend to direct r the foul 'ai r ofthe; building through certain; of the fines in "the body or stack which find an outlet passage inthe-hood or PIt is a further object iofthe invention to 1:; provide a- Ventilator of. this-class wherein file-down currents of; fresh air will be. regulated and wherein-thermcurrents 'of foul ,ai-r will-find a ready outletpassage.

It I is; a --fu-r th}er obiect of the invention to produce a device of this character wherein the air passages-in the cowlare. fully pro- *t-e'cted so that-rain. snow or sleet cannot enter therethrough, but wherein the free pas- :sage of air currents inibotha downward and upward direction willnotbe interfered with. a:

It is a stillfurther object of the invention to produce a Ventilator vfor buildings comprising a tubular member or stack hav- 5 Jinga plurality of flues therein,lto' arrange upon the said stack a-cowl having vertically disposed passagres protected by suitable ?'plates to shieldthelsame from the elements i bn' t which shields. however, do not interfere with thefree passage-of: air through the said cowl;- and to furtherarrani're a valve between the cowl and stack whereby the inssage of fresh air; into the building and the outlet of the stale air from the building may 1 be regqulated tosuit atm'osohericconditions.

a It is a still further object of the invention .to produce a device of this character which may be. readily installed upon] any building, which shall be or a. comparatively citizenjof the United States, residing at others which will appear as the nature pf "the invention is more fully understood,'-th e simple construction, but which is thoroughly vetlicient for the purposedesigned; I

VVith the foregoing objects in View,

improvement resides i-n the construction and operativearrangement of parts set forth in p'rovement "as applied on the roof of a building.

Fig. 2 isga sectional view 'aiaproximately onqthe line 2 2 of Fig. '1. I

'Fig. 3 is a "ventical sectional View approximately 011 "the line 3 8 of Fig, 1.; a

Fig.;4 is a sectional view approximately on the lin 0 'h Fig. 5 is-a bo ttom plan view 'f the cqw 'l. Fig. 6 is a perspective View of the valve.

Fig; 7 is a bottom plan View of the tu- I bular body or stack.

The root10 of a building 1 1 isprovided asuitable roundgop'enin'g receiving the lower or inner end of the tubular body of stack-12' of my .iimprov'em'ent The stack has secured thereon a suitable flanged collar 13 which surrounds the 'openingin the roof and which is secured to the roof. The tuibular stack 12 is provided with right aneullarly arranged partitionsl l extending the entire length of the said stack dividing the interior thereof into four separate lines 1'5 1-5. The stack 12, adjacent to its outer end, and upon its outer surface, is provided with a plurality of spaced spring finge'r's 16.

The hood or cowl for the tubular stack is broadly indicated by the numeral 17, the same also comprising a tubular body hav iiig a conical top 18. In the top. and at a suitable distance inward, of the edge thereof is secured, man desired or preferred manii'er an annular member or ring 19;, while at the botton'rof the s id cowl is a n d I similar ring 20, The rings 19 and 20. areconnected by afseries of inner and outer members 21 and "22 respectively, the said 'men'ibe'r's in connection with the rings formingth'e side or bodyot the cowl. v

,Th e inner members, it will be noted, by reference to the drawings are approximately "Speciiica tion of t'tte'rsrieht. Paten'ted Dec. 31, 1918. Applicatioil fiiedeu ust'sr-ie v. serial No. 189,147; I

semi-cylindrical in cross section having their edges flanged inwardly, as at 23, and these flanges are secured, in any desired or preferred manner, to the inner periphery of the ring members 19 and 20, the lower edges of the said semi-cylindrical members being projected a suitable distance below the lower ring member 20, as clearly illustrated by the drawings. The outer members 22 comprise plates which are centrally bent upon them selves, so that the same comprise angle members and the edges of these members are secured to the outer periphery of the ring members 19 and 20, in such a manner as to each bridge two of the inner members 21. The outer members or plates are properly spaced away from each other as are the inner members 21, and the spaces provided between the said spaced inner and outer members provide both the air entrance and the air outlet passages of the device. The cowl is designed to he slipped over the outer end of the stack 12, certain of the -crosssectionally U-shaped'members comprising the inner wall of the cowl, being engaged by the spring fingers 16 to effectively sustain the cowl upon the stack. The arrangement of the inner and outer walls of the cowl, providing the air passages ftherebetween is such that the air will take a tortuous path or direction in enteringthe stack and be directed through the flues thereof to the build ing, and likewise, the air from the building will take a similar path in finding an exit through the passages in the cowl. The arrangement is also such that regardless of the operation of the aircurrents on the exterior of the building, certain of such currents by the numeral 24. the same including a flat cylindrical top. plate 25, having upon its outer face a circular band or ring 26. While secured to the inner face of the said top 25 is two right angularly disposed plates 272' 7, each, in the nature of a right angular member, and the apex of these plates are spaced away from each other, whereby both of the said plates may be snugly received in two of the diametrically o posite flues 15 in the stack 12, the said plates serving as protecting means for the valve proper.

To the plate or top 25 of the valve 24, near the center thereof, is secured one end of a flexible elementpr'eferablv in the nature of a a grooved pulley 29 journaled in a suitable hanger 30 that is secured in the center of the be arranged in convenient proximity to the.

operator of the valve from the interior of the building, and upon the said interior of the building is arranged suitable means for holding the chain, whereby the valve maybe retained in' proper regulated position.

When the valve is in its closed position, the

top 25 thereof, will contact with the outer end of the stack, and by raising the said valve the determined volume of air may be let into the; building and likewise. a'd'cbuilding, and from the foregoing description, when taken in connection with the drawings, the simplicity and advantages of the construction will be apparent without further detailed description. v Having thus described my invention, what I claim is:

1. In a ventilator for buildings or the like, a stack, spring fingers thereon. a cowl inner and. an outer series of channeled members having their edges secured to the inner 'and outer surfaces of said rings and connectn g means between the top and the outer setermined volume of air may be let out of the :1

eluding a conical top. spaced rin s. an inries of members, and certain ot'the inner z series of said m mbers designed to engage with the spring fingers, whereby to hold the cowl upon the stack.

2. In a ventilator for buildings or the like.

with a series of concentrically arranged spaced fingers, a cowl including a top and a body constructed of spaced rings and an inner and outer series of channeled members inner memb rs desi ned to be enga ed 'by the s ring fingers of the. stack to hold the cowl thereon, a valve in the stack, said valve a stack having its outer surface provided having their ed essecured to the inner and" 'outer surfaces of the rings, certain of said comprising a flat circular member having an a nular flan e on the up er surface thereof whereby to hold said valve out of contact with the top of the cowl,'and means for vertically movin the valve between the top of the stack and the cowl.

3. In a ventilator for buildings. a 'staclc,

chain 28, the said chain being trained around Conical top and Sa d cowl engaged he, V

spring fingers; to hold the same on the stack, a fiat valve normally resting on the top of the stack inward of the cowl, said valve having upon its outer surface a flange designed to contact with the top of the cowl to hold the valve out of such contact, angle plates on the under face of the valve and received in for moving the valve vertically of the cowl over the stack.

In testimony whereof I afiix my signature ALFRED LAAKSO.

Copies of this patent may be obtained for five cents each. by addi'eesing the "Commissioner of Patents, Washington, D. G." 

